stokes



(No Model.)

G. H. STOKES. GUARD POR- GIRGULAR SAW MILLS.

No. 417,204. Patented Dec. 10, 1889.

WITNESSES:

I 6 J/. fw

ATTORNEY.

UNITED STATES PATENT OFFICE.

CIIAR L IS 1T. STOKES, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TOGEORGE V. LOVDEN, OF SAME PLACE.

GUARD FOR CIRCULAR-SAW MILLS.

SPECIFICATION forming part of Letters Patent No. 417,204, dated December10, 1889. Application filed June 10, 1889- Serial No. 313,691. (Nomodel.)

To to whom, it may concern.-

Ee it known that 1, CHARLES ll. STOKES, a citizen of the United States,residing at Baltimore, in the State of Maryland, have in- 5 ventedcertain new and useful Improvements in Guards for Circular-SawMills, ofwhich the following is a specification.

This invention relates to a guard or safety device for circular saws. Itis for use in ripto ping broad boards into narrow ones for flooring,ceiling, or wainscoting, and is designed to protect the operator who isfeeding the boards to the saw.

Two saws are usually worked in ripping r5 flooring to make three narrowboards, and it sometimes happens that as the narrow boards are about topass from the saws one of the latter will catch a tooth into the end ofa board and throw it back with great force in the direction from whenceit was fed, and in this way the person who is feeding the broad board issubjected to peril.

The object, therefore, of this invention is to prevent the boards frombeing thrown back, 2 5 and thus protect the operator.

Figure 1 is a side view of a sawing-machine with inyimproved guard. Fig.2 is a top view. Fig. 3 is a detail showing the guard.

The frame A, saw-shaft b, circular saws c, 0 rollers (I, and feed-rollsc are all of the usual construction.

My invention does not in any way change the construct-ion of asawing-machine.

The guard consists of a stop-board F, having at each end a journal orpivot g, which rest in suitable boxes or bearings 7L, secured to theframe A of the machine. The pivoted stop-board has position directly infront of the circular saws c. This stop board is 40 weighted at itslower edge 1', and thereby the upper edge 7i: is kept in anupwardly-projecting position, as shown.

Suitable blocks Z are socured to the frame, and the stop-board comesagainst said blocks when in the upwardly-pro jecting position. 5

In the present instance the person who feeds the broad board stands atthe left-hand end of the machine, and the boards move over the rollers(Z in the direction of the dart toward the saws and pass over thestop-board F, causing the latter to tilt, the upper edge Ittiltingforward and down. The feed-rolls 6 will draw the board along while thesaws cut it, and the moment the rear end of said broad board passes offthe down-tilted stop-board the edge It of the latter will again projectupward, and thus assume a position to stop the narrow boards and preventthem from being thrown back should the saws catch them, as aboveexplained. Thus the pivoted stopboard F is no hinderance to feeding theboards to the saws, but will prevent the saws throwing a board back.

Having described my invention, I claim- 1. In a circular-saw1nachine,the combination of the frame, the circular saw, and a stopboardpivoted to the frame in front of the saws and weighted, substantially asdescribed, whereby the stop-board will tilt down to allow the lumber tomove toward the saw, and the moment the lumber has passed the stop-boardthe latter will tilt upward and prevent the lumber from being thrown.back.

2. The combination of circular saws, a stopboard pivoted to the frame infront of the saws, and blocks Z, against which the stopboard comes whenin the upwardly-proj ectin g position.

In testimony whereof I affix my signature in the presence of twowitnesses.

CHARLES H, STOKES.

\Vit-nesses:

CHAS. B. MANN, JOHN E. MORRIS.

